Apparatus for coating objects with a liquid



June 5, 1934. Bl NIER 1,961,301

APPARATUS FOR COATING OBJECTS WITH A LIQUID Filed June 1'1, 1932 y B/l/f'ef /5 /Nvefv -rme UNITED STATES PATENT OFFICE APPARATUS FOR COATING OBJECTS WITH A LIQUID Bruno Nier, Beier-feld, Germany Application June 11, 1932, Serial No. 616,723 In Germany May 17, 1930 5 Claims. (Cl. 91-42) My invention relates to an apparatus for coatne tin dust is not entrained by the flowing ing objects with a liquid, for instance, tinning airthem, In the accompanying drawing an apparatus It is an object of my invention to facilitate embodying my invention as applied t tipping,

the recovery of the excess liquid which does iS illustrated by Way 0f eXample. a0

not adhere to the coated objects. In the drawing To this end, in combination with a tank for Fig 1 is a sectional elevation 0f the apparatus, the coating liquid, for instance, molten tin, taken 0n the line' I--I in Fig, 2, and and a rotary support for the objects to be coated Fig.l 2 iS a plan View 0f the apparatus.

from which the excess liquid is hurled away by Referring nOW t0 the drawingy 1 iS bliCkWOlk, 65 centrifugal action, I provide a baille for inter- 16 iS a l60p plate 0n the briekWOrk, with a Seat cepting the excess liquid. in its centre, and 2 is a tank for a molten bath Tinninglis very important for the manufae- 0f tin which is inserted in a central hole of ture of metal objects of many kinds which are the iOp platey With a ilange 17 all its upper end protected from rust by the coating of tin. in bearing 0n the Seat in the top plate. 3 is a 7o quantity production, for instanoe, in the mann.. vertical shaft which is mounted to rotate and .to facture of wind lanterns and similar objects, Slide in a h0l`iz0ntal arm 0I bracket 18. and 4 the commercial adaptability of tinning is often iS a Support fel the Objects t0 be tlnned at the determined -by the possibihty of performing it lower end of shaft 3. Rotation is imparted to 20 under economic conditions because tin is comthe Shaft 3 by any Suitable means. not ShOWn- 75 parativeiy expensive and lthe tinning process it- 6 is an annular baffle the inside diameter of seh also involves some oost which is larger than the outside diameter of the The tinning, for instance, of wind lanterns, is support 4 and the outside diameter of which is frequently performed by immersing the objects less than the inside diameter of the tank 2.

in a bath of menen tin and removing the ex- In the position Shown in full lines in Fie. 1, the so oess tin by centrifugal aotiorr 'The objects to baffle is in its topmost position at the level of be tinned are immersed by means of a rotary the elevated support 4 so that it will intercept support which is then rotated, the tin which flies off the objects if the support In the tinning processes as performed here- 4 S rotated. ThE IOWETITIOSI)V pOSIIOn- Of the i-,ofore lhe loss of tin is high This drawback baille is shown in dotted lines in Fig. 1. In this 35 is eliminated according to my invention, position of the baiile the tin which adheres to its 1n a preferred enibodimeni-I of my invention I inner wall is melted and recovered by the molten provide a movable annular baille and rotate the im in the tank rotary support, with the objects thereon, in the The raisins and lowering of the barile 6 is baille after it has been lifted out of the bath. facilitated by balance Weights 14. 8 1S a frame 90 The tin which separates from l@he objeets by having two parallel bars which are spaced apart centrifugal action, is intercepted by the baille ai? Opposite SideS 0f the Central VeTtiCal plane and splashing loss is avoided. of the shaft 3 and the tank 2 and partly cir- The movable bafiie is preferably adapted to be cular, aS ShOWn in Fig. 2; fOr engaging the Sides immersed in the molten tin bathby hand or by 0f the baille 6. They may be 0f Channel Section 95 mechanieai means so that the tin adhering to and at one end are connected by a. transverse it is remelted in the bath y brace 20 with a handle 10. 11 are vertical The saving of tin effected by my' method ls guide rods at the ends of the frame bars 8. Very Considerable 12 are sleeves on the brickwork 1 for guiding the Results will be particularly favorable if the barss 19 arehvertical bractketston the top plate 100 baffle is subdivided into elements which partly are s eaves mmm ed o rotate at the overlap, with air spaces between them, like a upgler eng? hof the brackets' 15 ,are ropes or venetian blind. The air expelled by the tin as ca es W 1c are attached to the bars 8 at it strikes the baille is not entrapped which might one end' and to the balance welghts 14 at the 5 other. Conventional means is provided for rais- 105 cause rejection of tin to the articles on the lng and lowering the bame 6, and the balance rotary support. but flows away between the baffle weights 14 may be dispensed with in smaller elements. The baille elements must be S0 pOSiapparatus. The conventional means for raising tioned with respect to each other that all the and lowering the baille 6 may comprise the electin is retained by the baille elements and the tric winding drum a hooked to the ring e at- 110 tached to the spider b mounted on the upper ends of the guide rods 11, which are extended for the purpose.

The operation is as follows :v

Normally the baille 6 is in its lowermost position in the tank 2 as shown in dotted lines in Fig. l, and the shaft 3 with the support 4 is in its elevated position. The objects to be tinned are placed on the support 4 which is then lowered into the tank 2 and returned to its upper or initial position after a given time. same time with the support 4, or immediately after, the baille 6 is raised and moved into the position shown in full lines in Fig. 1. The shaft 3 is now rotated and the excess tin is thrown oir the support 4 and the objects thereon. The tin either flows back into the bath immediately or solidies on the inner wall of the baie 6 and is remelted when the baiiie returns /into the molten bath in tank 2.

The modication in which the baie is designed as a built-upmember with elements like those of a Venetian blind has not been illustrated but will readily be understood as to its design and function by a person skilled in the art.

I claim:

1. An apparatus for coating objects with a liquid, comprising a xed tank for the liquid; a rotary support for the objects to be coated which is adapted to be raised and lowered with respect to, and to be ,immersed in, said tank; a baie for intercepting the excess liquid thrown olf said support as it rotates, said bale being adapted also to be raised and lowered independently of said support with respect to, and to be immersed in, said tank; and mechanism. for raising and lowering the baie with respect to 40, the tank and with respectto said support.

2. An apparatus for coating objectswith a liquid, comprising a fixed tank for the liquid; a rotary support for the objects to be coated which is adapted to be raised and lowered with respect to, and to be immersed in, said tank; an annular baffle for intercepting the excess liquid thrown off said support as it rotates, said baie being adapted also to be raised and lowered independently of said support with respect to, and

At the to be immersed in, said tank; and mechanism for raising and lowering the bale with respect to the tank and with respect to said support.

3. An kapparatus for coating objects with a liquid, comprising a xed tank for the liquid; a rotary support for the objects to be coated which is adapted to be raised and lowered with respect to, and to be immersed in, said tank; an annular baille for intercepting the excess liquid thrown off said support as it rotates, saidr baffle being adapted also to be raised and lowered independently of said support with respect to, and to be immersed in, said tank; means for balancing the weight of said baille, and mechanism for raising and lowering the bafe with respect to the tank and with respect to said support.

4. An apparatus for coating objects with a liquid, comprising a fixed tank for the liquid; a rotary support vfor the objects to be coated which is adapted to be raised and lowered with respect to, and to be immersed in, said tank; and an annular bale for intercepting the excess liquid thrown off said support as it rotates, said baie being adapted also to be raised and lowered independently of said support with respect to, and to be immersed in, said tank, and said baffle having overlapping elements with air spaces between them; and mechanism for raising and lowering the baffle with respect to the tank and with respect to said support.

5. An apparatus for coating obiectswith a liquid, comprising a xed tank for the liquid; a rotary support for the lobjects to be coated which is adapted to be raised and lowered with respect to, and to be immersed in, said tank;`an annular baffle for intercepting the excess liquid thrown off said support as it rotates, said baille being adapted also to be raised and lowered independently of said support with respect to, and

to vbe immersed in, said tank; a frame on said baie, rods and guiding sleeves for guiding said battle as it moves; balance weights connected to said frame for balancing the weight of the frame and the baiile; and mechanism for raising and lowering the baiile with respect to the tank and with respect to said support. V

BRUNO NIER. 

